2 * Broadcom specific AMBA
3 * Broadcom MIPS32 74K core driver
5 * Copyright 2009, Broadcom Corporation
6 * Copyright 2006, 2007, Michael Buesch <mb@bu3sch.de>
7 * Copyright 2010, Bernhard Loos <bernhardloos@googlemail.com>
8 * Copyright 2011, Hauke Mehrtens <hauke@hauke-m.de>
10 * Licensed under the GNU/GPL. See COPYING for details.
13 #include "bcma_private.h"
15 #include <linux/bcma/bcma.h>
17 #include <linux/mtd/physmap.h>
18 #include <linux/platform_device.h>
19 #include <linux/serial.h>
20 #include <linux/serial_core.h>
21 #include <linux/serial_reg.h>
22 #include <linux/time.h>
24 static const char * const part_probes[] = { "bcm47xxpart", NULL };
26 static struct physmap_flash_data bcma_pflash_data = {
27 .part_probe_types = part_probes,
30 static struct resource bcma_pflash_resource = {
31 .name = "bcma_pflash",
32 .flags = IORESOURCE_MEM,
35 struct platform_device bcma_pflash_dev = {
36 .name = "physmap-flash",
38 .platform_data = &bcma_pflash_data,
40 .resource = &bcma_pflash_resource,
44 /* The 47162a0 hangs when reading MIPS DMP registers registers */
45 static inline bool bcma_core_mips_bcm47162a0_quirk(struct bcma_device *dev)
47 return dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM47162 &&
48 dev->bus->chipinfo.rev == 0 && dev->id.id == BCMA_CORE_MIPS_74K;
51 /* The 5357b0 hangs when reading USB20H DMP registers */
52 static inline bool bcma_core_mips_bcm5357b0_quirk(struct bcma_device *dev)
54 return (dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM5357 ||
55 dev->bus->chipinfo.id == BCMA_CHIP_ID_BCM4749) &&
56 dev->bus->chipinfo.pkg == 11 &&
57 dev->id.id == BCMA_CORE_USB20_HOST;
60 static inline u32 mips_read32(struct bcma_drv_mips *mcore,
63 return bcma_read32(mcore->core, offset);
66 static inline void mips_write32(struct bcma_drv_mips *mcore,
70 bcma_write32(mcore->core, offset, value);
73 static const u32 ipsflag_irq_mask[] = {
75 BCMA_MIPS_IPSFLAG_IRQ1,
76 BCMA_MIPS_IPSFLAG_IRQ2,
77 BCMA_MIPS_IPSFLAG_IRQ3,
78 BCMA_MIPS_IPSFLAG_IRQ4,
81 static const u32 ipsflag_irq_shift[] = {
83 BCMA_MIPS_IPSFLAG_IRQ1_SHIFT,
84 BCMA_MIPS_IPSFLAG_IRQ2_SHIFT,
85 BCMA_MIPS_IPSFLAG_IRQ3_SHIFT,
86 BCMA_MIPS_IPSFLAG_IRQ4_SHIFT,
89 static u32 bcma_core_mips_irqflag(struct bcma_device *dev)
93 if (bcma_core_mips_bcm47162a0_quirk(dev))
94 return dev->core_index;
95 if (bcma_core_mips_bcm5357b0_quirk(dev))
96 return dev->core_index;
97 flag = bcma_aread32(dev, BCMA_MIPS_OOBSELOUTA30);
105 /* Get the MIPS IRQ assignment for a specified device.
106 * If unassigned, 0 is returned.
107 * If disabled, 5 is returned.
108 * If not supported, 6 is returned.
110 static unsigned int bcma_core_mips_irq(struct bcma_device *dev)
112 struct bcma_device *mdev = dev->bus->drv_mips.core;
116 irqflag = bcma_core_mips_irqflag(dev);
120 for (irq = 0; irq <= 4; irq++)
121 if (bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq)) &
128 unsigned int bcma_core_irq(struct bcma_device *dev)
130 unsigned int mips_irq = bcma_core_mips_irq(dev);
131 return mips_irq <= 4 ? mips_irq + 2 : 0;
133 EXPORT_SYMBOL(bcma_core_irq);
135 static void bcma_core_mips_set_irq(struct bcma_device *dev, unsigned int irq)
137 unsigned int oldirq = bcma_core_mips_irq(dev);
138 struct bcma_bus *bus = dev->bus;
139 struct bcma_device *mdev = bus->drv_mips.core;
142 irqflag = bcma_core_mips_irqflag(dev);
147 /* clear the old irq */
149 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
150 bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) &
152 else if (oldirq != 5)
153 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(oldirq), 0);
155 /* assign the new one */
157 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0),
158 bcma_read32(mdev, BCMA_MIPS_MIPS74K_INTMASK(0)) |
161 u32 irqinitmask = bcma_read32(mdev,
162 BCMA_MIPS_MIPS74K_INTMASK(irq));
164 struct bcma_device *core;
166 /* backplane irq line is in use, find out who uses
167 * it and set user to irq 0
169 list_for_each_entry(core, &bus->cores, list) {
170 if ((1 << bcma_core_mips_irqflag(core)) ==
172 bcma_core_mips_set_irq(core, 0);
177 bcma_write32(mdev, BCMA_MIPS_MIPS74K_INTMASK(irq),
181 bcma_debug(bus, "set_irq: core 0x%04x, irq %d => %d\n",
182 dev->id.id, oldirq <= 4 ? oldirq + 2 : 0, irq + 2);
185 static void bcma_core_mips_set_irq_name(struct bcma_bus *bus, unsigned int irq,
188 struct bcma_device *core;
190 core = bcma_find_core_unit(bus, coreid, unit);
193 "Can not find core (id: 0x%x, unit %i) for IRQ configuration.\n",
198 bcma_core_mips_set_irq(core, irq);
201 static void bcma_core_mips_print_irq(struct bcma_device *dev, unsigned int irq)
204 static const char *irq_name[] = {"2(S)", "3", "4", "5", "6", "D", "I"};
205 printk(KERN_DEBUG KBUILD_MODNAME ": core 0x%04x, irq :", dev->id.id);
206 for (i = 0; i <= 6; i++)
207 printk(" %s%s", irq_name[i], i == irq ? "*" : " ");
211 static void bcma_core_mips_dump_irq(struct bcma_bus *bus)
213 struct bcma_device *core;
215 list_for_each_entry(core, &bus->cores, list) {
216 bcma_core_mips_print_irq(core, bcma_core_mips_irq(core));
220 u32 bcma_cpu_clock(struct bcma_drv_mips *mcore)
222 struct bcma_bus *bus = mcore->core->bus;
224 if (bus->drv_cc.capabilities & BCMA_CC_CAP_PMU)
225 return bcma_pmu_get_cpu_clock(&bus->drv_cc);
227 bcma_err(bus, "No PMU available, need this to get the cpu clock\n");
230 EXPORT_SYMBOL(bcma_cpu_clock);
232 static void bcma_core_mips_flash_detect(struct bcma_drv_mips *mcore)
234 struct bcma_bus *bus = mcore->core->bus;
235 struct bcma_drv_cc *cc = &bus->drv_cc;
236 struct bcma_pflash *pflash = &cc->pflash;
238 switch (cc->capabilities & BCMA_CC_CAP_FLASHT) {
239 case BCMA_CC_FLASHT_STSER:
240 case BCMA_CC_FLASHT_ATSER:
241 bcma_debug(bus, "Found serial flash\n");
242 bcma_sflash_init(cc);
244 case BCMA_CC_FLASHT_PARA:
245 bcma_debug(bus, "Found parallel flash\n");
246 pflash->present = true;
247 pflash->window = BCMA_SOC_FLASH2;
248 pflash->window_size = BCMA_SOC_FLASH2_SZ;
250 if ((bcma_read32(cc->core, BCMA_CC_FLASH_CFG) &
251 BCMA_CC_FLASH_CFG_DS) == 0)
252 pflash->buswidth = 1;
254 pflash->buswidth = 2;
256 bcma_pflash_data.width = pflash->buswidth;
257 bcma_pflash_resource.start = pflash->window;
258 bcma_pflash_resource.end = pflash->window + pflash->window_size;
262 bcma_err(bus, "Flash type not supported\n");
265 if (cc->core->id.rev == 38 ||
266 bus->chipinfo.id == BCMA_CHIP_ID_BCM4706) {
267 if (cc->capabilities & BCMA_CC_CAP_NFLASH) {
268 bcma_debug(bus, "Found NAND flash\n");
269 bcma_nflash_init(cc);
274 void bcma_core_mips_early_init(struct bcma_drv_mips *mcore)
276 struct bcma_bus *bus = mcore->core->bus;
278 if (mcore->early_setup_done)
281 bcma_chipco_serial_init(&bus->drv_cc);
282 bcma_core_mips_flash_detect(mcore);
284 mcore->early_setup_done = true;
287 static void bcma_fix_i2s_irqflag(struct bcma_bus *bus)
289 struct bcma_device *cpu, *pcie, *i2s;
291 /* Fixup the interrupts in 4716/4748 for i2s core (2010 Broadcom SDK)
292 * (IRQ flags > 7 are ignored when setting the interrupt masks)
294 if (bus->chipinfo.id != BCMA_CHIP_ID_BCM4716 &&
295 bus->chipinfo.id != BCMA_CHIP_ID_BCM4748)
298 cpu = bcma_find_core(bus, BCMA_CORE_MIPS_74K);
299 pcie = bcma_find_core(bus, BCMA_CORE_PCIE);
300 i2s = bcma_find_core(bus, BCMA_CORE_I2S);
301 if (cpu && pcie && i2s &&
302 bcma_aread32(cpu, BCMA_MIPS_OOBSELINA74) == 0x08060504 &&
303 bcma_aread32(pcie, BCMA_MIPS_OOBSELINA74) == 0x08060504 &&
304 bcma_aread32(i2s, BCMA_MIPS_OOBSELOUTA30) == 0x88) {
305 bcma_awrite32(cpu, BCMA_MIPS_OOBSELINA74, 0x07060504);
306 bcma_awrite32(pcie, BCMA_MIPS_OOBSELINA74, 0x07060504);
307 bcma_awrite32(i2s, BCMA_MIPS_OOBSELOUTA30, 0x87);
309 "Moved i2s interrupt to oob line 7 instead of 8\n");
313 void bcma_core_mips_init(struct bcma_drv_mips *mcore)
315 struct bcma_bus *bus;
316 struct bcma_device *core;
317 bus = mcore->core->bus;
319 if (mcore->setup_done)
322 bcma_debug(bus, "Initializing MIPS core...\n");
324 bcma_core_mips_early_init(mcore);
326 bcma_fix_i2s_irqflag(bus);
328 switch (bus->chipinfo.id) {
329 case BCMA_CHIP_ID_BCM4716:
330 case BCMA_CHIP_ID_BCM4748:
331 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
332 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
333 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0);
334 bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_PCIE, 0);
335 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
336 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0);
338 case BCMA_CHIP_ID_BCM5356:
339 case BCMA_CHIP_ID_BCM47162:
340 case BCMA_CHIP_ID_BCM53572:
341 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
342 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
343 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
345 case BCMA_CHIP_ID_BCM5357:
346 case BCMA_CHIP_ID_BCM4749:
347 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_80211, 0);
348 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_MAC_GBIT, 0);
349 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_USB20_HOST, 0);
350 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_CHIPCOMMON, 0);
351 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_I2S, 0);
353 case BCMA_CHIP_ID_BCM4706:
354 bcma_core_mips_set_irq_name(bus, 1, BCMA_CORE_PCIE, 0);
355 bcma_core_mips_set_irq_name(bus, 2, BCMA_CORE_4706_MAC_GBIT,
357 bcma_core_mips_set_irq_name(bus, 3, BCMA_CORE_PCIE, 1);
358 bcma_core_mips_set_irq_name(bus, 4, BCMA_CORE_USB20_HOST, 0);
359 bcma_core_mips_set_irq_name(bus, 0, BCMA_CORE_4706_CHIPCOMMON,
363 list_for_each_entry(core, &bus->cores, list) {
364 core->irq = bcma_core_irq(core);
367 "Unknown device (0x%x) found, can not configure IRQs\n",
370 bcma_debug(bus, "IRQ reconfiguration done\n");
371 bcma_core_mips_dump_irq(bus);
373 mcore->setup_done = true;